摘要
目的研究丘脑网状核(Reticular thalamic nucleus RT)内一氧化氮(NO)能神经元参与大鼠睡眠调节的可能机制。方法采用脑立体定位、核团埋管及微量注射和多导睡眠描记技术(PSG)。结果RT双侧分别微量注射一氧化氮的供体硝普钠(SNP,0.2μg,浓度是0.2mg·L-1)后引起觉醒增多;注射可溶性鸟苷酸环化酶(soluble guanylate cyclase,sGC)抑制剂亚甲蓝(MB,1.0μg,浓度是1.0mg·L-1)后睡眠增加,且SNP促觉醒的作用可被MB所阻断。结论RT参与大鼠睡眠-觉醒周期的调节,RT中的NO能神经元可能有促觉醒作用,可能与NO激活sGC而升高环磷酸鸟苷(cyclic guanosine monophosphate,cGMP)水平有关。
Aim To study the mechanism of nitric oxide neurons in reticular thalamic nucleus in sleep regulation in rats. Methods Brain stereotaxic technigne,microinjection,polysomnography(PSG) and nucleus spile were used. Results Sodium nitrioprusside ( SNP,0. 2μg), the donor of nitric oxide (NO) , enhanced wakefulness. Methylene blue (MB, 1.0μg), an inhibitor of soluble guanylate cyclase (sGC), increased the sleep time of slow wave sleep (SWS) and total sleep time( TST), and can block the wake-promoting effect of SNP. Conclusion Reticular thalamic nucleus (RT) plays an important role in the sleep-waking cycle in rats. Nitric oxide neurons in reticular thalamic nucleus can promote wake, which was mediated by activation of sGC and increase of cGMP concentration.
出处
《解放军药学学报》
CAS
2008年第3期226-228,共3页
Pharmaceutical Journal of Chinese People's Liberation Army
基金
安徽医科大学校青年科研基金
No.200301
国家自然科学基金项目
No.30400611
安徽省教育厅高等学校青年教师科研重点基金项目
No.2005jq1091zd
关键词
一氧化氮
硝普钠
亚甲蓝
睡眠
丘脑网状核
MeSH nitric oxide, Sodium nitrioprusside
Methylene blue
Sleep
Reticular thalamic nucleus